December weather forecastGlenns Ferry, ID
December
Weather in December
The first month of the winter, December, is also an icy month in Glenns Ferry, Idaho, with an average temperature ranging between max 35.4°F (1.9°C) and min 24.4°F (-4.2°C).Temperature
December tends to be the coldest month, with temperatures averaging a daily high of 35.4°F (1.9°C) and a low of 24.4°F (-4.2°C).Humidity
In Glenns Ferry, the average relative humidity in December is 75%.Rainfall
The month with the most rainfall in Glenns Ferry is December, when the rain falls for 8.1 days and typically aggregates up to 1.22" (31mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In December, it is snowing for 5.2 days. Throughout December, 2.44" (62mm) of snow is accumulated. In Glenns Ferry, during the entire year, snow falls for 17.7 days and aggregates up to 8.7" (221mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:53 am and sunset at 5:07 pm. On the last day of December, sunrise is at 8:12 am and sunset at 5:16 pm MST.
Sunshine
With an average of 6.1h of sunshine, December has the least sunshine of the year in Glenns Ferry.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Glenns Ferry. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for average individuals.Note: A maximum high daily UV index of 2 during December translates into the following directions:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Glenns Ferry, ID
- Average high temperature in December: 35.4°F
The warmest month (with the highest average high temperature) is July (91.8°F).
The month with the lowest average high temperature is December (35.4°F).
- Average low temperature in December: 24.4°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is December (24.4°F).
Average pressure in December
Glenns Ferry, ID
- Average pressure in December: 30.23"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in December
Glenns Ferry, ID
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is April (9.2mph).
The calmest month (with the lowest average wind speed) is September (6.8mph).
Average humidity in December
Glenns Ferry, ID
- Average humidity in December: 75%
The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is July (26%).
Average rainfall in December
Glenns Ferry, ID
- Average rainfall in December: 1.22"
The wettest month (with the highest rainfall) is December (1.22").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in December
Glenns Ferry, ID
- Average rainfall days in December: 8.1 days
The month with the highest number of rainy days is March (12.3 days).
The month with the least rainy days is July (3.1 days).
Average snowfall in December
Glenns Ferry, ID
- Average snowfall in December: 2.44"
The month with the highest snowfall is January (2.99").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Glenns Ferry, ID
- Average snowfall days in December: 5.2 days
The month with the highest number of snowfall days is December (5.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Glenns Ferry, ID
- Average daylight in December: 9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 6h and 6min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 6min).
Average sunshine days in December
Glenns Ferry, ID
- Average sunshine days in December: 19.2 days
The month with the most sunshine days is July (25 days).
The month with the least sunshine days is March (16.5 days).
Average UV index in December
Glenns Ferry, ID
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Glenns Ferry, ID
- Average cloud cover in December: 36
The month with the most cloud cover is December (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in December
Glenns Ferry, ID
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
